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<script>
var x;
document.write("<p> Only 17 digits: ");
x=12345678901234567000;
document.write(x+"</p>");

document.write("<p> 0.2 + 0.1 =");
x=0.2 + 0.1;
document.write(x+"</p>");

document.write("<p>Multiple and Divided by 10 : ");
x=(0.2*10+0.1*10)/10;
document.write(x+"</p>");

</script>

</body>